As a species, we're rather skilled at using words to convey the opposite of what we mean. It's a talent.
When sarcasm becomes a lifestyle, though, it's a problem.
It's not just about the words, it's about the tone and the context and the intent.
Or is it?
Maybe it's just about us, as a species, being a bunch of pompous windbags who can't be bothered to actually communicate effectively.